/* 整体设置 */
body{
	font-family: '微软雅黑';
}
*{
	margin: 0;
	padding: 0;
}
li{
	list-style: none;
}
a{
	text-decoration: none;
}
*,*:before,*:after{
	-webkit-box-sizing: border-box;
	-o-box-sizing: border-box;
	-moz-box-sizing: border-box;
	-ms-box-sizing: border-box;
	box-sizing: border-box;
} 
img{
	box-shadow: 5px 5px 15px #1d1d1d;
}

/* 网页的头部设置 */
#back_top{
/*	height: 60px;
	width: 60px;*/

	position: fixed;
	bottom: 120px;
	left: 50%;
	margin-left: 600px;
	border-radius: 8px;
	overflow: hidden;
}
#btn{
	height: 60px;
	width: 60px;
	line-height: 60px;
	color: #fff;
	text-align: center;
	display: block;
	background-color: #aaa;
}
#btn:hover{
	background-color: #b957bf;
	color: #ddd;
}
.header{
	background-image: url(../img/banner.jpg);
	background-repeat: no-repeat;
	background-size: cover;
	/*position: center;*/
	padding: 15em 0;
	text-align: center;
}
.container{
	margin-right: auto;
	margin-left: auto;
	width: 1100px;
}
.logo_a{
	color: #aaa;
}
.logo_a:hover{
	color: #fff;
	border-bottom:1px solid #fff;
}
.logo>h1>a{
	font-size: 2em;
	font-weight: 900;
	color: #fff;
}
.logo>span{
	color: #fff;
}
.nav>li>a{
	color: #aaa;
	font-size: 15px;
}
.nav>li{
	width: 120px;
	text-align: center;
	line-height: 45px;
	margin: 1em;
	display: inline-block;
}
.active{
	border-radius: 10px;
	border: 2px solid #fff ;
	
}
.active>a{
	color: #fff !important;
	cursor: not-allowed;
}
.nav>li>a:hover{
	color: #fff;
} 

/* 网页内容的设置 */
.main{
	padding: 6em 0;
}
.row_left>h2,
.row_right>h2{
	margin-bottom: 15px;
}
.row_left>span,
.style>li>span{
	display: block;
	margin-bottom: 10px;
}
.main_a{
	display: block;
	margin-bottom: 15px;
}
.main_a>img{
	display: block;
	width: 100%;
}
.row:after{
	display: block;
	content: '';
	clear: both;
}
.row_left{
	width: 62%;
	float: left;
	margin-right: 50px;
}
.row_right{
	width: 	33%;
	float: 	right;	
}
.demo{
	padding: 3em 0 6em;
	background-color: #e2c6ea;
}
.demo_text{
	font-size: 18px;
	height: 60px;
	width: 610px;
	text-align: center;
	border: 1px solid #5e505b;
	color: #5e505b;
	margin: 35px auto;
	border-radius: 10px;
	line-height: 60px;
}
.box{
	width: 32%;
    float: left;
    margin-right: 14px;
}
.demo_ul>li{
	margin-bottom: 10px;
	display: block;
	width: 100%;
}
.demo_ul>li>img{
	width: 100%;
	padding: 10px;
	background-color: #fff;
}
.style>li{
	display: block;
	border-bottom: 1px solid #1d1d1d;
	height: 120px;
	margin-bottom: 15px; 
}
.img{
	margin-right: 20px;
	display: block;
	float: left;
}
.text{
	text-indent: 2em; 
	font-size: 14px;
	color: #1d1d1d;
}

.footer{
	padding: 6em 0;
	background-color: #1d1d1d;
}
.footer_ul>li{
	width: 100%;
	color: #fff;
	font-size: 14px;
	display: block;
	margin-bottom: 20px;
}
.footer_ul>li>img{
	display: block;
	border-radius: 50%;
	margin: 0 auto;
	box-shadow: 5px 5px 10px #aaa;
}
.footer_ul>li>span{
	font-size:50px;
	color: #aaa;
}
/* 页面尾部的设置 */
